Countermovement Jump (CMJ)
- Left net impulse
- Right net impluse
- Net Impulse Symmetry Index
- Left Peak Force
- Right Peak Force
- Peak Force Symmetry Index
- Left – time to peak force
- Right – time to peak force
- Time to peak force Symmetry Index
- Left Avg RFD
- Right Avg RFD
- Avg braking RFD Symmetry Index
- Unweighting Duration
- Braking Duration
- Propulsive Duration
- Peak Braking Force
- Avg Braking Force
- Min Braking Velocity
- Avg Braking Velocity
- Peak Braking Power
- Avg Braking Power
- Braking Work
- Force @ Zero Velocity
- Avg Propulsive Force
- Peak Propulsive Force
- Peak Propulsive Velocity
- Avg Propulsive Velocity
- Peak Propulsive Power
- Avg Propulsive Power
- Propulsive Work
- Avg Braking RFD
- Left Braking RFD
- Right Braking RFD
- Braking RFD Symmetry Index
- Deceleration RFD
- Deceleration RFD, Left
- Deceleration RFD, Right
- Deceleration RFD, Symmetry Index
- System Weight
- Flight Time
- Net Impulse
- Jump Height (Flight Time)
- Jump Height (Net Impulse)
- Takeoff Velocity
- Peak Force
- Peak Velocity
- Peak Power
- Force @ Peak Power
- Velocity @ Peak Power
- Time to Peak Force
- Avg RFD
- Contact Time
- RSI Modified
Squat Jump (SJ)
- Left net impulse
- Right net impulse
- Net Impulse Symmetry Index
- Left Peak Force
- Right Peak Force
- Peak Force Symmetry Index
- Left – time to peak force
- Right – time to peak force
- Time to peak force Symmetry Index
- Avg Propulsive Force
- Peak Propulsive Force
- Peak Propulsive Velocity
- Avg Propulsive Velocity
- Peak Propulsive Power
- Avg Propulsive Power
- Propulsive Work
- Deceleration RFD, Left
- Deceleration RFD, Right
- Deceleration RFD, Symmetry Index
- System Weight
- Flight Time
- Net Impulse
- Jump Height (Flight Time)
- Jump Height (Net Impulse)
- Takeoff Velocity
- Peak Force
- Peak Velocity
- Peak Power
- Force @ Peak Power
- Velocity @ Peak Power
- Time to Peak Force
- Avg RFD
- Contact Time
- RSI
- RSI Modified
Drop Jump (DJ)
- System Weight
- Flight Time
- Jump Height (ft)
- Contact Time
- RSI
- RSI Modified
- RSI Exponential
Metric Explanations
Here are short descriptions of what each metric means and it’s corresponding unit.
Flight Time
Explanation: Time spent in the flight phase.
Unit: s
Net Impulse
Explanation: The total impulse (bodyweight subtracted) applied during the braking+propulsive phase.
Unit: N.s
Jump Height (Flight Time)
Explanation: Jump Height calculated by Flight Time (FT).
Unit: cm
Jump Height (Net Impulse)
Explanation: Jump Height calculated by Net Impulse (NI).
Unit: cm
Peak Braking Force
Explanation: The peak instantaneous force during the braking phase.
Unit: N
Avg Braking Force
Explanation: The average force during the braking phase.
Unit: N
Min Braking Velocity
Explanation: The minimum velocity during the braking phase.
Unit: m/s
Avg Braking Velocity
Explanation: The average velocity during the braking phase.
Unit: m/s
Peak Braking Power
Explanation: The peak instantaneous power during the braking phase.
Unit: W
Avg Braking Power
Explanation: The average mechanical power during the braking phase.
Unit: W
Braking Work
Explanation: The total work done during the braking phase.
Unit: J
Force @ Zero Velocity
Explanation: The force applied at the moment when velocity is zero.
Unit: N
Avg Propulsive Force
Explanation: The average force during the propulsive phase.
Unit: N
Peak Propulsive Force
Explanation: The peak instantaneous force during the propulsive phase.
Unit: N
Peak Propulsive Velocity
Explanation: The highest velocity reached during the propulsive phase.
Unit: m/s
Avg Propulsive Velocity
Explanation: The average velocity during the propulsive phase.
Unit: m/s
Peak Propulsive Power
Explanation: The maximum power output during the propulsive phase.
Unit: W
Avg Propulsive Power
Explanation: The average power output during the propulsive phase.
Unit: W
Propulsive Work
Explanation: The total work done during the propulsive phase.
Unit: J
Avg Braking RFD
Explanation: The average slope of force during the braking phase.
Unit: N/s
Left Braking RFD
Explanation: The average (left) slope of force during the braking phase.
Unit: N/s
Right Braking RFD
Explanation: The average (right) slope of force during the braking phase.
Unit: N/s
Braking RFD Symmetry Index
Explanation: Symmetry Index (SI) % of the average braking RFD – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
Deceleration RFD
Explanation: The rate of force development during deceleration.
Unit: N/s
Deceleration RFD, Left
Explanation: The rate of force development during deceleration for the left side.
Unit: N/s
Deceleration RFD, Right
Explanation: The rate of force development during deceleration for the right side.
Unit: N/s
Deceleration RFD, Symmetry Index
Explanation: Deceleration RFD Symmetry Index (SI) with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
System Weight
Explanation: Measured weight of the user during the weighting phase, just before the jump.
Unit: kg
Takeoff Velocity
Explanation: The velocity at takeoff.
Unit: m/s
Peak Force
Explanation: The peak instantaneous force during the entire jump.
Unit: N
Peak Velocity
Explanation: The peak instantaneous velocity during the propulsion phase.
Unit: m/s
Peak Power
Explanation: The peak instantaneous power during the entire jump.
Unit: W
Force @ Peak Power
Explanation: The instantaneous force at peak power (of entire dataset).
Unit: N
Velocity @ Peak Power
Explanation: The instantaneous velocity at peak power (of entire dataset).
Unit: m/s
Time to Peak Force
Explanation: time from initiation of the jump to max peak force encountered during the jump.
Unit: s
Avg RFD
Explanation: Average Rate-of-Force Development (RFD).
Unit: N/s
Contact Time
Explanation: Time spent in contact with the PlateMate during the jump analysis, before takeoff.
Unit: s
RSI
Explanation: RSI = Flight Time / Contact Time.
Unit: No unit (ratio)
RSI Modified
Explanation: Modified RSI (mRSI) = Jump Height (FT) / Contact Time.
Unit: m/s
RSI Exponential
Explanation: Our own formula for RSI during Drop Jumps: FlightTime^2 / Contact Time.
Unit: m/s
Left net impulse
Explanation: The Left impulse (bodyweight subtracted) applied during the braking+propulsive phase
Unit: N s
Right net impluse
Explanation: The Right impulse (bodyweight subtracted) applied during the braking+propulsive phase
Unit: N s
Net Impulse Symmetry Index
Explanation: Net impulse Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
Left Peak Force
Explanation: Left Peak Force encountered during the jump
Unit: N
Right Peak Force
Explanation: Right Peak Force encountered during the jump
Unit: N
Peak Force Symmetry Index
Explanation: Peak Force Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
Left – time to peak force
Explanation: (Left) Time taken to reach peak instantaneous force (from start of jump)
Unit: s
Right – time to peak force
Explanation: (Right) Time taken to reach peak instantaneous force (from start of jump)
Unit: s
Time to peak force Symmetry Index
Explanation: Average braking RFD Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
Left Avg braking RFD
Explanation: The (Left) average RFD during the braking phase
Unit: N/s
Right Avg braking RFD
Explanation: The (Right) average RFD during the braking phase
Unit: N/s
Avg braking RFD Symmetry Index
Explanation: Average braking RFD Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.
Unit: %
Unweighting Duration
Explanation: Duration of the unweighting fase
Unit: s
Braking Duration
Explanation: Duration of the braking fase
Unit: s
Propulsive Duration
Explanation: Duration of the propulsive fase
Unit: s